This is not a variable describing the system-under-management
bridge.openstack.org - it's a variable that is always true for all
systems in the puppet group.
As a result, update the puppet apply test to figure out which directory
we should be copying modules _from_ - since the puppet4 tests will be
unhappy otherwise.
Change-Id: Iddee83944bd85f69acf4fcfde83dc70304386baf